Christopher, just looking at the fish won't give you enugh information to determine wether or not you have a population inballance. Keeping good records is crutial. What you need to do is get yourself a relitive weight chart and a notebook, catch a whole lot of fish, record the lengths and weights of every one, and calulate all of thier relitive weights. Then you will have a beter idea of what condition your populations are in. If you are managing for trophy bass, when 20-25% or more of bass in a given size range are slightly underweight than you need to cull the bass within that size range. If you dont already have a relitive weight chart I think you can get one at bassresource.com but I can't remeber the exact link right now.
The only other advice I can give you at the moment is, keep on reading. This website has a ton of really great information to learn from.
-Scott

Take great care of it, or let someone else have it.